Invention Grant
- Patent Title: Process using substituted metallocene catalysts and products therefrom
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Application No.: US15253252Application Date: 2016-08-31
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Publication No.: US09951155B2Publication Date: 2018-04-24
- Inventor: Jo Ann M. Canich , Peijun Jiang
- Applicant: ExxonMobil Chemical Patents Inc.
- Applicant Address: US TX Baytown
- Assignee: ExxonMobil Chemical Patents Inc.
- Current Assignee: ExxonMobil Chemical Patents Inc.
- Current Assignee Address: US TX Baytown
- Main IPC: C08F210/06
- IPC: C08F210/06 ; C08F110/06 ; C08F4/6592 ; C08F10/00 ; C08F10/06 ; C08F4/659 ; C08F210/02

Abstract:
This invention relates to a process to produce propylene polymer using a bridged hafnium transition metal metallocene catalyst compounds having two indenyl ligands substituted at the 4 positions with a C1 to C10 alkyl, where the 3 positions are hydrogen (assuming the bridge position is counted as the one position) and the bridging atom is carbon or silicon which is incorporated into a cyclic group comprising 3, 4, 5, or 6 silicon and/or carbon atoms that make up the cyclic ring, where the propylene polymer has 1) greater than 40% vinyl chain ends, relative to the total unsaturated chain ends, 2) a Tm of 70° C. or more; an Mw of 3000 to 300,000 g/mol, and 4) a g′vis of 0.90 or less.
Public/Granted literature
- US20160369016A1 Process Using Substituted Metallocene Catalysts and Products Therefrom Public/Granted day:2016-12-22
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